Gas-reversing valve.



(No Model.)

IFT-' will Patented Dec. 24, |90I.

GAS REVERSYINGfVALVE (Applicatn med Aug. 1s, 1901.

2 Sheets-Sheet I.

' No. 639,832. y minimum-24, 190|.v

l|:. J. w. RICHARDS &' R. MARSHALL.

GAS REVEBSING VALVE. (Application alga Aug. 1R, 1901.) (llo Model.) 2Sheng-Sheet 2.

.Pl-TE M Ih E L Il E mi l 1W f' hi wfg.. i I l I Il" 1W UNITED STATESPATENT OFFICE.

EDGAR JOSIAH WINDSOR RICHARDS, OF GLENGARNOCK, AND ROBERT MARSHALL, OFKILBIRNIE, SCOTLAND.

GAS-REVERSING VALVE.

SPECIFICATION fO-mhg part Of Letters :Patent N0. 689,832, dated December24, 1901. Application led August 13, 1901. Serial No. 71,912. (Nomodel.)

To @ZZ whom it may concern:

Beit known that we, EDGAR J osIAII WIND- SOR RICHARDs,a resident ofCottage, Glengarnock, and ROBERT MARSHALL, a resident of EllangowanCottage, Kilbirnie, Scotland, subjects of the King of the United Kingdomof Great Britain and Ireland, haveinvented an Improved Gas-ReversingValve for Sie.- mens Furnaces and the Like, of which the following is aspecication.

This invention relates toan improved valve for use with Siemensfurnaces, gas-tired heating-furnaces, and for use generally where it isdesired to reverse the direction of flow of gas through mains or flues,and has for its object to provide a valve having no mechanically movingor operated parts exposed to the deleterious action ofthe gases, such asis the case with valves as hitherto constructed, whereby the valve ismaintained perfectly tight in use and its life lengthened. To attainthis end, our improved valve is provided with four chambers, each fittedwith a bridge or diaphragm, so arranged that the said several chamberscan be each water-sealed. In use only two of the said chambers aresealed, the path of the gas-through the valve being then by way of thetwo unsealed chambers.

To reverse the direction of flow of gas through.

the Valve, the two formerly-sealed chambers are now unsealed and theformerly-unsealed chambers sealed, means forthe sealing and unsealing ofthe chambers being hereinafter described.

As an example of the method of carrying our invention into effect, Wemay employ an 4 vouter casing of any convenient shape and arrange thefour internal chambers in pairs one above the other, (but they may beotherwise 'arranged,) so that the diaphragm or bridge of each of thelower chambers may depend from the bottom of the upper chambers. Thegas-inlet is preferably situated between the upper pairvof chambers. andthe outlet between or below the lower pair, the space between the upperchambers being rendered gas-tight. VVhemtherefore,l one diagonal pair ofchambers is sealed, the gas passes through the highermost of the otherdiagonal pair to (in this example) the heated regenerator, then throughthe regenerator to the f urnace,where it is mixed with heated air fromanother regenerator and ignited. The waste gases after passing through asecond pair of regenerators" to heat same are led through the lowermostof the unsealed diagonal chambers and thence to the chimney. Byunsealing this diagonal pair of chambers and sealing the other the gasis caused'to take the opposite path.

The essential feature of our invention is the provision of the chambersand the sealing and unsealing of an alternate pair, the means forperforming. such sealing and unsealing being capable of attainment invarious ways.

- Inl order that -our said invention may be more readily understood andeasily carried uinto effect, we will proceed. to describe the same withreference to the accompanying drawings, in which- Figure l is a frontelevation showing our improved gas-reversing valve applied to a Siemensfurnace. Fig. 2 is a vertical longitudinal section .through theapparatus.

In the carrying out of our invention we employ an arrangement of fourwater-sealed valves A, B, C, and D, which are carried on the casing E,which is preferably formed as a rectangular framing consisting of therecl tangular-shaped hollow or tubular portion E, join ted together bythe anges e. Depending from the inside of the casing E into the saidvalves are diaphragms E E2 E3 E4, which cause the gases to pass underthem when the valves A B are not water-sealed. Connected at the one sideand near to the bottom of the said valves are the pipes A B' C D', theother side of the said pipes being connected to the wa` ter-cylinders Fand G at their ends F F2 G2, so that the cylinder F governs the supplyof water to the valves A and D, the other cylinder G governing thesupply of water to the Valves B C. One diagonal pair of valves arealways actuated simultaneously, whether it be for sealing or forallowing the passage of the gases through the regenerators H to thefurnace J and passing out at the iiuej.

For operating the water-cylinders F and G we employ a hydraulic cylinderK and connecting-rod L, mounted on the standM, (between the saidwater-cylinders.) The cou- IOO pled connecting-rod L is connected to thepiston-blocks within the water-cylinders F and G. The action of the saidhydraulic ram is to force the water out of the water-cylinder F into thevalve A through the medium of the pipe A', the water seal for the valveB being simultaneously actuated by the watercylinder G. The same actionis eiected with regard to the valves C D only on the return stroke ofthe connecting-rod. We may employ a hand-lever for operating thehydraulic ram, or we may have same operated by a lever which may becoupled to a rocking shaft.

In order that the passage of the gases may be readily understood, thesame is indicated by the arrows in Fig. l, the gases coming into thecasing E from the producer at Eand passing down 'the connections to thefurnace J, as shown.

We claiml. In a gas-reversing valve, the combination with four chambersarranged in pairs, water-cylinders connected to said chambers in pairs,and means for withdrawing the Water in one pair of chambers anddischarging it into the other pair of chambers to reverse the directionof flow of gas through the valve, means for preventing the passage ofgas through the chambers in which the Water is present, openings for theadmission of air or gas into the chambers and outlets therefrom to thestack-flue.

2. In a gas-reversing valve, the combination with four chambers,arranged in pairs diagonally disposed, water-cylinders connected to saidchambers in pairs, means for withdrawing the water in one pair ofchambers and discharging it into the other pairs of chambers to reversethe direction of flow of gas through the valve, means for preventing thepassage of gas through the chambers in which the water is present,openings for the admission of air or gas into the chambers and outletstherefrom to the stack-flue.

3. In a gas-reversing valve, the combination with four chambers arrangedin pairs diagonally disposed, diaphragms extending vertically into andabove the chambers, watercylinders connected to said chambers in pairs,means for withdrawing the water from one pair of chambers anddischarging it into the other pair of chambers to reverse the directionof iow of gas through the valve, openings for the admission of air orgas into the chambers and out-lets therefrom to the stack-due.

` EDGAR JOSIAII WINDSOR RICHARDS.

ROBERT MARSHALL.

Witnesses:

JOHN LAMONT, JAMES BRODIE.

